import React, { Component } from 'react'

export default class App extends Component {
  render() {
    // return (
    //   <React.Fragment>
    //     <h1>app组件</h1>
    //   </React.Fragment>
    // )
    return (
      <>
        <h1>app组件</h1>
      </>
    )
  }
}
